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. UNITED f STATES PATENT OFFICE;-

STEPHEN M. WESTON AND CHARLES T. SHANNER, 0F SOMERVILLE, 1ND.

ROTARY COLTER.

SPECIFICATION forming part of Letters Patent No. 272,368, dated February 13, 1883.

' Application filed May 5, 1582. (N0 model.)

To all whom at may concern I Be it known that we, STEPHEN M. WESTON and CHARLES T. SHANNER, of Somerville, in the county of Gibson and State of Indiana, haveinvented certain new and useful Improvements in Rotary (Jolters, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 is a side elevation of our improvement. Fig. 2 is a sectional front elevation of The object of this invention is to promote the durability and. efflciency of rotary colters. The invention consists, mainly, in arotary colter constructed with movable bearings of novel form for taking up the wear, and a looking key and pawl for fastening the colter to its axle, as will be hereinafter fully described. A is the colter-standard, the upper part of which is designed to be secured to a plowbeam in the ordinary manner. The lower end of the'standard A is forked to receive the colter B, and in the lower ends of the arms of the said standard are formed slots to receive the bearings O D for the journals of the colteraxle E. The lower part, 0, of the bearings is cast in the lower end of the slot in the standard-arm, as it is not liable to be worn, the pressure of the journals being upward. The upper part, D, of the bearings fits into the upper part of the slot in the standard-arm, and has a groove in its upper edge to receive the wedge-key F, which is driven into short slots in the arm of the standard A, so that the bear- The ends of the axleE project at, the outer side of the standard-arms, and itsjournals are made of a less diameter than the body of the axle, so that the shoulders thus formed will 0 rest against the opposite sides of the bearin gs and prevent the axle from having any longitudinal movement. In the center of the colter B is formed a square eye, to fit upon the middle part, c, of the axle E, to prevent the said colter from turning upon the said axle. The colter B is placed upon the center of the axle E, and rests against a flange, H, cast upon the said axle. Upon the inner side of the flange H are cast pins or projections I, which pass through holes in the colter B and enter holes in the collar J, placed upon the axle E at the other side of the colter B from the flange H. The collar J has a square eye formed through its center, to fit upon the square middle part 6 of the axle E, and is pressed firmly against the colter B by a wedge-key, K, driven into a slot formed through the axle F, as shown in Fig. 2. By this construction all wear will come upon the axle-journals and the bearings and can be readily taken up, so that all irregular movements of the colter will be prevented and the colter willbe made toadvance in a straightline.

We are aware that shafting-boxes have before been retained in position by wedging- 7 5 keys drawn to placeby screw-nuts on their little ends, and we do not claim this as our invention; but

What we claim is 1. The combination, in a rotary colter, of the forked standard A, the adjustable bearings D, the notched key F, the spring-pawl G, the axle E, having flange H and pins I, the colter B, the movable collar J, and locking-key K, as set forth. 8

2. In a rotary colter,the combination, with the slotted arms of the standard A and the colter-axle E, of the movable bearings D, the wedge-keys F, and their locking-pawls Gr, substantially as herein shown and described, 0 whereby the wear of the axle-journals can be readily taken up and the colter made to revolve true, as set forth.

STEPHEN MURRATT WESTON. CHARLES T. SHANNER. Witnesses:

ELIAS H. YAGER, JAMES M. STEVENS. 

